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5+4(7+9)=0
We simplify the equation to the form, which is simple to understand
5+4(7+9)=0
Reorder the terms in parentheses
5+(+64)=0
Remove unnecessary parentheses
+5+64=0
We move all terms containing to the left and all other terms to the right.
0=0-5-64
We simplify left and right side of the equation.
0=-69
0=-69
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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